The factory driveshaft in the GTO is the weakest part of the entire driveline. It's a two piece design that is only 2 inches diameter and uses rubber mounts instead of u-joints. Not only do the rubber mounts contribute to wheelhop, they are notorious for failing on slightly modified cars. Our heavy duty 3.5" aluminum driveshafts are 30 lbs. lighter which allows much faster noticeable engine spooling and a one-piece design that use forged 1350 series u-joints. Each driveshaft comes with a cryogenically frozen front yoke and a custom machined 300M billet pinion yoke adaptor. Rated for up to 900HP at more than 7200 RPM.